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PRINTING OF ACRYLIC

PRINTING OF ACRYLIC. POLYACRYLONITRILE FIBRE AVAILABLE IN INDIA IS A COPOLYMER OF ACRYLONITRIL AND VINYL ACETATE OR ANY OTHER COMONOMER WITH ACID GROUPS MECHANISM OF DYE BINDING ELECTROSTATIC FORCE OF ATTRACTION BETWEEN DYE AND FIBRE SUITABLE DYE CLASS: MODIFIED CATIONIC DYES

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PRINTING OF ACRYLIC

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  1. PRINTING OF ACRYLIC POLYACRYLONITRILE FIBRE AVAILABLE IN INDIA IS A COPOLYMER OF ACRYLONITRIL AND VINYL ACETATE OR ANY OTHER COMONOMER WITH ACID GROUPS MECHANISM OF DYE BINDING ELECTROSTATIC FORCE OF ATTRACTION BETWEEN DYE AND FIBRE SUITABLE DYE CLASS: MODIFIED CATIONIC DYES DYE +ve CHARGE FIBRE -ve CHARGE

  2. -ve CHARGE ON FIBRE • IONIZATION OF ACID GROUPS OF COMONOMER e.g. COO- GROUPS • RESIDUE OF REDOX INITIATORS (SODIUM BISULPHITE AND POTASSIUM PERSULPHATE) RESPONSIBLE FOR TERMINAL SO-3 GROUPS.

  3. PRINT PASTE COMPOSITION CATIONIC DYE 2-4 PARTS ACETIC ACID 2-3 PARTS THIDIETHYLENE GLYCOL 3 PARTS HOT WATER 20 PARTS CITRIC ACID 2 PARTS SODIUM CHLORATE 0.5 PARTS PHENOL 1-2 PARTS THICKENER PASTE TO MAKE 100 PARTS

  4. FUNCTIONS • ACETIC ACID: IMPROVES DYE SOLUBILITY • THIO DEG: HYGROSCOPIC AGENT, DYE SOLVENT • CITRIC ACID: DYE FIXATION DURING STEAMING • SODIUM CHLORATE: OXIDIZING AGENT. COMPENSATES REDUCING ACTION OF THICKENER DURING STEAMING • PHENOL: FIBRE SWELLING AGENT. IMPOROVES COLOUR YIELD • SEQUENCE PRINT > DRY > STEAM 45 MIN. > WASH > SOAP > WASH > DRY

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